MEDIUMMCQ SINGLENEET ChemistryInorganic Chemistryp-Block (group 13 and 14)Introduction to p-block Elements
Trimethylammonia is pyramidal whereas trisilylammonia is a planar molecule. Why ?
A.In silicon atom, the electron pair of nitrogen is involved
B.In nitrogen, lone pair of electrons is present at
C.Both (a) and (b) are correct.✓ Correct
D.Both (a) and (b) are wrong.
Explanation
Silicon form p d p - p bonding with nitrogen, so it planar where as in case of trimethylamine the lone pair of nitrogen is localised and hence nitrogen is sp3 hybridised giving it a pyramidal structure. Physical and Chemical Properties of Group 13 Elements
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